Piston for engines



Feb. 2 1926. 1,571,427

T. A. MORRIE PIsToN FOR `ENGINES Filed Oct. 14, 1922 ATTOR N EY UnirseSTATES ITTSANNA ALFRED MHRIE, OF S'UGARLOAF, PENNSYLVANA.

FOR ETGI'NES.

application filed Octoberle, 1922. Seriali'NoffSfi'l.

To ai? infini-ni t may Con-cern.'

Be it known that l, 'ili'rfrisANNA A. Monnin, a citizen ot the UnitedStates, residing State oll ennsylvania, have invented a nen1 :indusetul. `finiprovenn-)nt in Pistons itor Engines, oi which the followingis a specilisation.

This invention relates to pistons 'for en gines, compressors and thelike, and has for its olfect the provision of a piston whaving a novelwrist pin mounting which Will eiiininate the holes ordinarily provided,it being .vell knon'n that such holes are a great source of oillealiage. l

Ein important and inore speciiic object is the provision ot a piston inwhich the Wrist pin is inounted within bearing boites detachably securedWithin the piston, and carry ing bushings which are renewable when Worn,and which are formed with `flanges engaging opposite sides ot theconnecting rod for preventing side slap, the bearings being, nioreover,provided with lubricating means.

1in additional object is the provision ot a piston ot this characterwhich will be siinple and inexpensive in manufacture, easy to asseinbleand disassenible, and which in addition to the above named advantages,is capable ot having Worn parts replaced to avoid discarding the entirepiston in case oi" wear.

To the attainment of the foregoing ob jects and advantages, theinvention consists in the details oit construction and ar rangenient tobe hereinafter described and claimed, and illust'V ted in theacconipany-v ing drawing, it being, however, understood that the rightis reserved to make clnuiges and modifications in the structure to widenthe iield of utility and adaptability of the device, provided suchvariations constitute no departure troni the salient features of theinvention or the scope oli the appended claims.

In the drawings:

Figure 1 is a longitudinal section through the piston showing onebearing box in elevation and the other in section;

Figure Q is a section at right angles to VFigure 1, with one side of onebearing box in elevation and the other side in section; and

Figure 3 is a view looking into the open end ot the piston and showingone bearing rloaitf, in the county of Luzerne and.

box and bushing in place-and the other reinoved.

Referring more particularly to thedravvings, the nunieral 10 designatesthe piston body which lis ot the usual construction, and Which includesthe ordinary head and skirt termed with grooves for the reception oi`packing rings, it being noted that the skirt is solid and treetrointheholeswhich are ordinarily provided 'torthe insertion of theWrist pin. Forinedwithin the head portion ot the piston are integralbosses 11 reinforced by integral Webs 12and 'formed withthreaded sockets13.

1n orderto niount the `Wrist pin 14 Within I the piston, l provide apair ot bearing boxes 15, formed With laterally extending ears 16designed to register with the bosses 11, and formed with holes Yfor thepassage ot studs or cap screws 17 Which are screwed into the sockets 13.Within each bearing box is a bushing 18 torrned with a hole 19,registering with an oil passage 2O in the top ot the associated bearingbox, for lubricating purposes. The inner ends of these bushings aretorined with flanges 21 which are adapted to engage the opposite sidesot the connecting rod, not shown, for the purpose of preventing sideslap.

To prevent turning nioven'ient of the bushings Within the bearing boxes,the box engaging face oit each flange 21 is 'lornied with av recess 22receiving a projection 28 on the adjacent end or edge ot the bearingbox. This means for preventing rotation oit the bushings Within thebearing boxes is important as it will prevent the holes 19 from gettingout of registration with the oil passages 20.

ln assembling the parts, the bushings 18 are placed Within the bearingboxes 15, and these assembled nieinbers are then slipped onto the endportions of the Wrist pin 1li, itV being of' course understood that theconnecting rod is engaged upon the .intermediate portion of the Wristpin. All these parts are then inserted into the piston, and the capscrews or studs 17 are screwed into the sockets 13, whereupon the partsWill be firinl y held in their proper position. It should be mentionedthat the heads of the studs or cap screws 17 are formed with holes 2athrough selected ones of which may be laced a suitable Wire or Wires,not shown, for seciVU the cap screws or studs together in pairs toprevent unscrewing thereof.`

From the foregoing description and a study of the drawings, it Will beapparent that I have thus provided a piston having a very elcient Wristpin mounting, which entirely eliminates the necessity for providing anyholes in the skirt of the piston. Lubrication of the Wrist pin Withinits bearings is assured, as the oil splashing Will pass through thepassages 20 and holes 19 and consequently lubricate the engagingsurfaces of the bushings and wrist pin. In case of excessive Wear, theparts may be easily disassembled and worn bushings replaced with newones. A noticeable feature is the 'fact that the bushing flanges 21 willoperate to prevent any side slap, and this will be conducive to smootherand quieter operation of the motor, pump or other device in which thepiston is used.

What is claimed is l. A piston formed internally with spaced integralbosses having threaded sockets, a pair of spaced Wrist pin bearing boxeshavingspaced lateral ears engaged against said bosses, threaded securingmembers passing through said ears and into said sockets, a bushingWithin each bearing box, the adjacent ends of said bushings being formedwith anges adapted to bear against the opposite sides of aconnecting rodmounted upon the Wrist pin, whereby to prevent side slap.

2. A piston formed internally with spaced integral bosses provided Withthreaded openings, one pair o1c bosses at each side of the piston, apair of Wrist pin bearing boxes located Within the piston and havingspaced ears engaging against said bosses, threaded securing memberspassing through said ears and into said openings of the bosses, bushingslocated Within the bones and having their inner ends formed Wit-hlia-nges, which are located at each side of the connecting rod mountedon said Wristpin, so as to overcome side sla-p, and means for preventingrotation of the bushings Within the boxes.

In testimony that I claim the foregoing as my own, I have hereto afiixedmy signature.

TITTISANNA ALFRED MORRIE.

